Computherm q3rf Operating Instructions Manual

Brand: Computherm

Model: q3rf

Category: Thermostats

Type: Operating Instructions Manual

Operating Instructions

NEW

design!

COMPUTHERM

Q3RF

wireless (radio-frequency) digital

room thermostat

GENERAL DESCRIPTION OF THE THERMOSTAT

The

COMPUTHERM

Q3RF type switched-mode room thermostat

is suitable to regulate the overwhelming majority of boilers and

air conditioners. It can easily be connected to any gas boiler or

air conditioning device that has a double wire connector for a

room thermostat, regardless of whether it has a 24V or 230V

control circuit.

Temperature can be measured and set more precisely as

compared to simple, conventional thermostats. In heating

mode, in accordance with the selected switching sensitivity, the

thermostat switches the boiler or any other appliances on and

off below and above the adjusted temperature, respectively, and

contributes to reduce energy costs while maintaining comfort. In

cooling mode it switches exactly the opposite way.

The device consists of two units. One of them is the portable

control unit (thermostat), while the other unit is the receiver that

controls the boiler. Because there is a wireless (radio-frequency)

connection between the two units, no cable is required between

the thermostat and the boiler. The two units have been tuned in the

factory so that they operate at the same frequency. The trouble-

free operation is ensured by its own security code. The installation

- 2 -

Temperature

measurement unit

Room temperature

is displayed

Set temperature

is displayed

Sign of the

boiler working

Sign of the air

conditioner

working

The information shown on the liquid crystal

display of the thermostat

includes the following:

and connection of the receiver unit is described in Section 7.

To increase the lifetime of the batteries, the thermostat will not

transmit signals continuously. Instead it will repeatedly transmit

the actual signal every 5 minutes. Therefore, the regulation of the

heating or cooling will continue even after a blackout.

The portability of the thermostat offers the following advantages:

–no need to lay a cable, which is especially advantageous

when old buildings are being modernized,

–the optimal location of the device can be selected during

operation,

–it is also advantageous when you intend to locate the

thermostat in different rooms in the course of the day (e.g. in

the living room during the day but in the bedroom at night).

The effective range of the transmitter incorporated in the

thermostat is approximately 50m in open terrain. This distance

may become considerably shorter within a building, especially

when a metal structure, reinforced concrete or adobe wall stands

in the way of radio waves.

The switching sensitivity of the thermostat can be set to ±0.1°C

- 3 -

230V AC

50-60 Hz

230V AC

50-60 Hz

Boiler

Receiver

Unit

Thermostat

or ±0.2°C (default setting). This means the difference between

the adjusted temperature and the actual temperature measured

during the switching process. In case of the ±0.2°C switching

sensitivity and heating mode for example, if the set temperature

is 20°C, then the device switches the boiler on at 19.8°C or

below, and switches it off at 20.2°C or above. Please refer to

Section 3.2 for the modication of the factory default switching

sensitivity of ±0.2°C.

This wireless (radio-frequency) thermostat can also be easily

extended with the

COMPUTHERM

Q1RX socket if needed,

with which the thermostat is able to control boilers or any other

electrical devices operating on 230V (50Hz; max. 10A) (e.g.

fan heaters, pumps, zone valves, etc.) according to the room

temperature.

1. LOCATION OF THE DEVICE

The thermostat of the

COMPUTHERM

Q3RF type device can be

freely moved in your residence. It is reasonable to locate it in

a room used regularly or for many hours per day so that it is

in the direction of natural ventilation in the room but protected

from drought or extreme heat (e.g. direct sunlight, refrigerator,

chimney, etc). Its optimal location is 1.5 m above oor level. It

can be placed on its own stand or can be mounted on a wall.

IMPORTANT WARNING! If the radiator valves in your at

are equipped with a thermostatic head, adjust it to maximum

temperature or replace the thermostatic head of the radiator

valve with a manual control knob in the room where the room

thermostat is to be located, otherwise the thermostatic head may

disturb the temperature control of the at.

- 4 -

2. PUTTING THE THERMOSTAT INTO OPERATION

To put the thermostat into operation,

detach the rear panel of the thermostat

from the front panel by pressing the

lock on the upper side of the housing of

the thermostat, as shown in the gure.

The battery compartment is in the inner

side of the front panel of the housing.

Insert 2 AA alkaline batteries (LR6 type) in accordance with the

diagram in the battery compartment. After the batteries have been

inserted, the display ashes the measured room temperature. (If

this information fails to appear on the display, press the „RESET”

button located on the main panel of the thermostat.

3. BASIC SETTINGS

After removing the rear panel of

the device, the following factory

default settings can be modied

by relocating the jumpers (black

plugs) located on the main panel.

3.1 Selecting the Displayed Temperature

The temperature(s) to be shown on the display can be selected

and set by the left jumper.

With factory default settings the jumper is located on the central

and uppermost pins, in which case the display shows the currently

measured room temperature value, while the notice “ROOM”

appears in the bottom right corner of the display. In this case,

the adjusted temperature is visible only during the adjustment

process, for approximately 7 seconds after the last button has been

pushed. By relocating the plug onto the bottommost and central

pins the displayed temperature can be modied so that the display

- 5 -

alternately shows the current room temperature and the adjusted

temperature for 4 seconds, respectively. In this mode, the notices

“ROOM” and “SET” are alternately shown under the currently

displayed temperature in the bottom right corner of the display,

indicating whether the display shows the room temperature or the

adjusted temperature value.

3.2 Selecting the Switching Sensitivity (Accuracy)

The switching sensitivity of the thermostat can be selected or

adjusted by the central jumper.

With factory default settings the jumper is located on the central

and uppermost pins, resulting in a switching sensitivity of ±0.2°C.

It can be modied to ±0.1°C by relocating the jumper onto the

bottommost and central pins. A smaller switching sensitivity

results in steadier room temperature and therefore in higher

comfort. The heat loss of the room (building) does not depend

on the switching sensitivity.

If higher comfort is needed, the switching sensitivity should be

set so that it provides a steadier room temperature. On the other

hand, please also take into account that the boiler should not

switch on and off multiple times in an hour’s time except at low

outside temperatures (e.g. -10°C), since the frequent on and off

switches of the boiler reduce its efciency and hence increases

the gas consumption. We recommend using the ±0.1°C switching

sensitivity for heating systems with high thermal inertia (e.g.

underoor heating), and the ±0.2°C switching sensitivity (factory

default setting) for heating systems with low thermal inertia (e.g.

at panel radiators).

3.3 Switching between the Heating and Cooling Mode

The heating or the cooling mode of the thermostat can be

selected by the right jumper.

With factory default settings the jumper is located on the central

- 6 -

and uppermost pins, which selects the heating mode. By

relocating the jumper onto the bottommost and central pins, the

cooling mode can be selected. The output terminals No. 1 (NO)

and No. 2 (COM) of the receiver unit are closed below the set

temperature in heating mode, and they are closed above the set

temperature in cooling mode (taking the switching sensitivity into

account). The closed state of the output terminals No. 1 (NO)

and No. 2 (COM) are indicated by the notice „HEAT” (heating) or

„A/C” (cooling) in the bottom left corner of the display, according

to the selected mode.

ATTENTION! If the modication of the basic settings was done

after inserting the batteries and the modications did not take

effect, please press the “RESET” button located on the main

panel of the thermostat.

3.4 Synchronising the Thermostat and the Receiver Unit

In order to have a safe, reliable

and trouble-free wireless

(radio-frequency) connection,

both the thermostat and the

receiver unit have their own

safety codes. After installing

the receiver unit, the two units

should be synchronised by

pressing the “LEARN” button

located above the battery

compartment, on the main panel of the thermostat. Therefore

do not replace the rear panel of the thermostat onto the front

panel before synchronisation. The process of synchronisation

is described in Section 7.2.

- 7 -

4. SETTING THE DESIRED TEMPERATURE

After putting the thermostat into operation and adjusting the basic

settings the thermostat is ready for operation and the adjustment

of the temperature can be started.

Below the temperature adjustment buttons

( and ) a switch is located. For both

the economy (w

) and the comfort (☼) positions

of the switch a different temperature can be

set between 5°C and 35°C, in steps of 0.5°C.

For energy efciency it is recommended that the comfort

temperature is only used those times, when the room or building

is in use, because every 1°C decrease of temperature saves

approximately 6% energy during a heating season. As opposed

to common belief, keeping a at warn requires more energy than

heating it up. (When using a stove, more gas is needed to keep

a pan of water boiling than to just keep it warm.)

The factory default temperature is 18°C for the economy (w

) position

and 20°C for the comfort (☼) position. These default temperatures

can be changed as follows:

• Move the switch according to the temperature you would like

to change (economy (w

) or comfort (☼)).

• Press the or button, after which the notice

“ROOM” disappears, the notice “SET” (adjusted value)

appears in the bottom right corner of the display. Meanwhile,

the temperature value shown on the display switches from

room temperature to the default temperature (18.0°C/20.0°C)

or to the last set temperature (this temperature is blinking

on the display). By pressing the buttons repeatedly or

continuously (the change in values is accelerated), the

desired temperature to be maintained at the place where the

thermostat has been installed can be set in steps of 0.5°C.

- 8 -

• Approximately 7 seconds after setting the room temperature

to be maintained, the device automatically switches to

normal mode. The notice “SET” disappears from the bottom

right corner of the display, and once again the current room

temperature and the notice “ROOM” are displayed.

• The previously set temperature can be freely changed any

time using the and buttons. Always the last set

temperatures are in effect.

5. OPERATION OF THE INSTALLED THERMOSTAT

After setting the economy and comfort temperatures, the

temperature needed at the moment can be selected using the

switch.

5.1 Economy Mode (w

) (left hand position of the switch)

In the left hand position of the switch, the thermostat provides

the set economy temperature (e.g. night temperature) to

be maintained at the place where the thermostat has been

installed. According to the change in room temperature and

temperature setting, the thermostat controls (switches on or

off) the boiler or any other equipment connected to it. When

activated, the normally open contact pairs, i.e. No. 1 (NO) and

No. 2 (COM), of the relay of the thermostat clamp shut, and, as

a consequence, the appliance connected to the thermostat is

switched on. The appearance of the notice “HEAT” (heating) or

„A/C” (cooling) in the bottom left corner of the display indicates

that the device is activated, according to the heating or cooling

mode, respectively.

5.2 Comfort Mode (☼) (right hand position of the switch)

In the right hand position of the switch, the thermostat provides

the set comfort temperature (e.g. daytime temperature) to be

- 9 -

maintained at the place where the thermostat has been installed.

According to the change in room temperature and temperature

setting, the thermostat controls (switches on or off) the boiler

or any other equipment connected to it. When activated, the

normally open contact pairs, i.e. No. 1 (NO) and No. 2 (COM), of

the relay of the thermostat clamp shut, and, as a consequence,

the appliance connected to the thermostat is switched on. The

appearance of the notice “HEAT” (heating) or „A/C” (cooling) in

the bottom left corner of the display indicates that the device is

activated, according to the heating or cooling mode, respectively.

6. BATTERY REPLACEMENT

The average lifetime of the batteries is 1 year. The icon

alternately replacing the temperature value on the display

indicates low battery voltage. Replace the batteries whenever

the icon indicating low battery voltage appears on the

display (see Section 2). After battery replacement, the desired

temperature should be adjusted again, because during the

battery replacement the thermostat is reset to factory default

settings.

7. THE RECEIVER UNIT

7.1 Installation and connection of the receiver unit

The receiver unit should be mounted on the wall in a place

protected against moisture and heat, in the vicinity of the boiler.

ATTE NTION! Do not install the receiver unit under the housing of

the boiler or near hot pipes because it may damage the parts of the

device or compromise wireless (radio-frequency) connection. To avoid

electric shock, entrust a specialist with connecting the receiver unit to

the boiler!

- 10 -

Unscrew the two screws at the bottom of the receiver unit without

removing them. Following this, remove the front panel of the

receiver unit then x the back panel to the wall in the vicinity

of the boiler with the screws provided. Remove the protective

carton from the contacts to ensure perfect contact.

The marks of the connections are pressed into the plastic above

the connection points: N, L, 1, 2 and 3.

230V mains voltage should be supplied to the receiver unit.

This provides the power supply for the device, but this voltage

does not appear on the terminals 1 and 2. We propose to

connect the neutral wire of the network to point N, while the

phase conductor to point L. We recommend using a fork type

connection including a switch for mains connection. Please de-

energize the device when heating is continuously not needed

(e.g. summer).

The receiver unit controls the boiler or air conditioner through a

potential-free alternating relay whose connection points are: 1

(NO), 2 (COM) and 3 (NC). Connect the two connection points

of the heating or cooling equipment to be controlled to terminals

No. 1 (NO) and No. 2 (COM), i.e. to the normally open terminals

of the relay as shown in the gure.

- 11 -

Heating unit (boiler)

Rear panel

of the

receiver unit

L (phase) 230V AC

50-60 Hz

230V AC

50-60 Hz

LN 1 2 3

COM

NO NC

If you would like to operate an old boiler or any other device that

has no connection points for thermostats, then the No. 1 (NO)

and No. 2 (COM) connection points of the thermostat should be

connected to the mains cable of the device, similarly as a switch

would be connected.

ATTE NTION! Always consider the loadability of the receiver unit

and follow the manufacturer’s instructions of the heating or cooling

equipment. The device must be installed and connected by a

qualied professional!

The voltage appearing at terminals No. 1 (NO) and No. 2 (COM)

depends only on the system being controlled, therefore the

dimensions of the wire are determined by the type of the device

to be controlled.

The length of the wire is of no signicance, the receiver unit may

be installed either near the boiler or far away from it, but do not

install it under the housing of the boiler.

If the distance between the transmitter and receiver units is too

large due to local circumstances and it makes the wireless (radio-

frequency) connection unreliable, install the receiver unit nearer

to the place of thermostat.

- 12 -

LN 1 2 3

COM

NO NC

Rear panel of

the receiver

unit

(phase) 230V AC, 50-60 Hz

230V AC

50-60 Hz

Pump (heater / infrapanel etc.)

7.2 Putting the receiver unit into operation

Turn on the power supply to the receiver unit. After a few

seconds have elapsed, the wireless (radio-frequency) system

(thermostat and receiver unit) tunes itself to the operating

frequency. To try the system in heating mode, press the

button of the thermostat several times, until the set temperature

is 2-3°C higher than the temperature of the room. Following

this, the “HEAT” icon indicating that the heating is turned on

should appear on the display of the thermostat within a few

seconds. At the same time, the red LED light on the receiver unit

should switch on to indicate that the receiver unit has received

the command of the transmitter (thermostat).

If it does not happen, the system should be retuned. For this

purpose press the “M/A” button of the receiver unit and keep it

depressed (for approximately 10 seconds) until the green LED

starts ashing. Then press the “LEARN” button located above

the battery compartment, on the main panel of the thermostat,

and keep it depressed (for approximately 10 seconds) until the

green LED stops ashing and goes out, so that the receiver

unit “learns” the safety code of the transmitter (thermostat). The

safety code will not be lost even during a power outage, the

device memorizes it automatically.

ATTENTION! Pressing the “LEARN” button for 10 seconds

generates a new safety code for the thermostat, and the receiver

will recognize it only after a repeated tuning. With this in mind,

do not keep the “LEARN” button of the thermostat or the “M/A”

button of the receiver unit depressed without any reason after the

two units have been tuned successfully.

7.3 Transmission distance inspection

With the help of the and buttons you can check

whether the two units are within the transmission distance of

the wireless (radio-frequency) connection. In order to do so,

- 13 -

set the desired temperature above room temperature by more

than 0.2°C, then reduce it below room temperature by more than

0.2°C. When detecting the ON and OFF control signals, the red

LED light on the receiver unit switches on and off, respectively.

When the receiver unit fails to receive signals sent by the

thermostat, then the receiver unit is outside the transmission

distance of the wireless (radio-frequency) transmitter, thus they

have to be placed closer to each other.

7.4 Manual control of the receiver unit

Pressing the “MANUAL” button separates the thermostat from

the receiver unit. In this case, the boiler or air conditioner

connected to the receiver unit can only be turned on and off

manually, without any temperature inspection. The continuously

illuminated green LED indicates “MANUAL” mode. Pressing the

“M/A” button turns on or off the boiler. (The red LED is illuminated

when the boiler is turned on). By pressing the “MANUAL” button

again, the device quits manual control and resumes automatic

(thermostat-controlled) operation (the green LED goes out).

- 14 -

The

COMPUTHERM

Q3RF type thermostat complies

with the requirements of standards EU EMC 2004/108/EC;

LVD 2006/95/EC and R&TTE 1999/5/EC.

Importer:

Thermostats4U

Email: [email protected]

For additional information visit:

thermostats4U.co.uk

- 15 -

TECHNICAL DATA

Technical data of the thermostat (transmitter):

‒ temperature measurement range: 0 to 35°C (in 0.1°C increments)

‒ adjustable temperature range: 5 to 35°C (in 0.5°C increments)

‒ temperature measurement accuracy: ±0.5°C

‒ selectable switching sensitivity: ±0.1°C; ±0.2°C

‒ storage temperature: 10°C to +40°C

‒ battery voltage: 2 x 1.5V ALKALINE batteries

(LR6 type; AA size)

‒ power consumption: 1.5mW

‒ battery lifetime: approx. 1 year

‒ operating frequency: 868.35MHz

‒ dimensions: 110 x 80 x 22mm (without holder)

‒ weight: 80g

‒ temperature sensor type: NTC 10kΩ ±1% at 25°C

Technical data of the receiver unit:

‒ power supply voltage: 230V AC, 50Hz

‒ power consumption: 6W

‒ switchable voltage: 24V AC/DC to 250V AC, 50Hz

‒ switchable current: 6A (2A inductive load)

‒ transmission distance: approx. 50m in open terrain

‒ weight: 150g

Total weight of the device: approx. 265g

(thermostat+receiver+holder)

For better reading download this Operating

Instruction from our website!

Computherm q3rf Operating Instructions Manual

Brand: Computherm

Model: q3rf

Category: Thermostats

Type: Operating Instructions Manual

Download PDF

report

Computherm q3rf Operating Instructions Manual

Computherm q3rf Operating Instructions Manual

Other documents